Mold for cement chimney-sections.



J. M. KEMP.

MOLD FOR CEMENT CHIMNEY SECTIONS,

APPLICATION FILED DEC. 15. I913. RENEWED MAR. 29, 1918.

1,285,217. 12mm NM. ISL-1918.

2 SHEEYS--SHEEI l.

'1. M. KEMP. H MOLD FOR CEMENT CHIMNEY SECTIONS APPLICATION FILED DEC. I5, I9I3. RENEWED MAR. 29. I918. 1,285,217.

Pntentml Nov. 19, 1918.

2 SHEETS-SHEET 2.

35 proved moldwith the top removed,,and

onnicn.

" JO ENM. ang, or IDES Mourns, IOWA.

orin madman cnnunnr-sncrrions' ",fin of new Patent Patented N ov. 19, 1918.;

Application filed December 15, 1913,6crial no; 897,349.. Itenewed- March a, 1918. Serial No. 225,554.

To all whom it may concern:

Be it known that I, JOHN M. KEMP, a citizen of the United States, and resident of Des Moines, in the county of Polk and State of Iowa, have invented a"certain new and useful Mold for Cement Chimney-Sections,

I ofwhich the following is a specification.

' The object of my'invention is;to provide a mold of simple,durable and inexpensive construction, particularly designed for the a manufacture of comparatively thin' walled blocks, adapted like. f i

More particularly, it is my object to provide a mold for the making of thin walled,

or use in chimneys and the hollow blocks, said mol'd having inner: and

outer walls, which are readily-removable, and being provided with new and'improved means forlockingthekinner and outer walls in 'properposition for making my blocks.

My invention consists in certain details, in the r construction, combination and arrangement'of the'various partsof the de-. vice, whereby the :objects contemplated are attained, ashereinaftermore fully set forth, pointed out in my claim and illustrated in the accompanying drawings, in which: 1 Figure 1 shows a vertical, transverse, sectional view through a mold, embodying my invention, with plastic'material therein,

Fig. 2 shows a cop 'oriplanview of-the base with the pallet installed thereon.

used the reference numeral 10 to indicate tion' by means of braces 14.

Fig. 3 showsa horizontahsectional view, taken on the line 3-3 of" Fig.1.

Fig. 4 shows; a rear elevation of my im- Fig.5 shows a horizontal, detail, sectional view of one of the devices for locking the outer. walls in position.

In thelaccompanying drawings I have generally the, base, or support of my im proved mold. Thebase 10 has a smoothflat upper surface andflis somewhat longer in onedimension than the greatest distance between thecouterlmold walls. Adjacent to one end is secured an upright .outer wall member 11, having at smooth:iuner face. The wall member lliismto at i SlO edge with an. outwardlyv extendingflange 12. which is secured tothe base 10 by means of bolts 13. The wall .11; is also held in posi- The pallet'ldis provided andisinthe form of a hollow souare,one sideiofthe pal-v let being nadieeent to-thewall ll; aisshown in rig. 1. -Tlio wallet is provided in its upper surface, on each of its'four sides with a groove 16, so that the lower edge of the cementblock may be made with a concave bead or ridge.

For purposes'of convenience, I will call the wall 11 and the opposite outer wall the end walls and the other outer walls the side Walls ofmy mold. a 1. Arranged inc a. vertical plane, parallel with the vertical plane of the wall ,11 and near the opposite endof the base 10 is the other end wall 17 which is secured to base at its lower edge by means of hinges 18. 1 It will be understood that'the pallet 15, fits snugly, against the four outer walls. Theside walls. 19 arehinged at their lower edges to thebase by-hinges 18 and are provided-yon their inner surfaces, near; their Near. the middle of the outer, surface of the walls 11 and 17, and near the upper portions thereof, are: brackets 21, to which are pivoted oppositely extending rods 22. The outer or free endsof the rods 22 are mounted in guide devices 23, secured to the rear surfaces of the walls 11 and 17, near their side edges', in such amanner as to permit certain pivotal movement of the rods 22 in a horizontal plane when the outer walls are in theirvertical positions. The free ends of the rods 22 are bifurcated to receive the'portions 19?, as shown in Figs. 3, 4: and 5. Mounted between the extreme bifurcated ends of the rods 22 are pivoted earns 24:. q l

The .portions 19* are provided on their outer surfaces with grooves orvnotches 25. Formed preferablyv integral with the cams 24 are handles or levers 26. The partsjust deeofibd'areso arranged that] when the four outer walls areassembled intheir' -upright positions, the handles 26 may be turned to position padjacent to he side walls.,1 9, when the thicker parts of the cams 243 will ententhe, grooves 25-jand engage the portions l9;,as,shown in Fig. 5, thereby firmly locking the four outer walls together. In the upper surfaces of the'p'allet 15,. near the inner edges thereof,. ar e a plurality of notches or grooves 27 Iprovide four-inner walls 29, each comprising two parts, divided on a vertical, central line, and secured together by means of hinges 30, so that said walls may fold inwardly at their centers. Suilicient play in the parts of the hinges is allowed to permit the. inner walls to' fold; inwardly. The end walls 29* may be" side walls 29. are placed in position with the lugs 32 received in the grooves" 27. 'lhe end walls 29 are then placed in position slightly above their proper place, when installed witlrtheirv centers folded inwardly The centers are then moved somewhat. outwardly on their hinges until the end walls 29 are in vertical position with the tongues of theside walls 29 received in the grooves of the end walls 29 and with. the members of each end wall in alinement. The end walls 29are then slid downwardly until the lugs, 32 thereof enter the slots 27. The rods 33 are then swung around until the eyelet 35 is received between the eyelets 3% and a bolt 36 is dropped through the three'eyelets. The inner walls are thereby locked firmly in position, as shown in Fig. 3. Cement is then poured into the intervening space between the inner and outer walls to form a block having four walls. The.

cement may be tamped into position, as desired. Hinged to the wall 11 is a top or cover 37, comprising four portions similar in form to the pallet 15. Each of the portions of the top 37 is provided with a downwardly extending bead 38 for forming .a groove in the upper edge of the block. Suitably mounted on thewall 11 are stop devices 39, against which the cover 37 may rest when in its raised position.

After the space between the inner and outer waillshas been filled with cement, or

other plastic material L0, the mold may be taken apart in the following manner:

The bolts 36 arev removed and the end members 29 are slid upwardly until the lugs 32 clear the pallet 15' and then said end members are folded inwardly along their middlelincs and removed. Theside inner walls 29 are then removed, the levers26 are swiing outwardly until the thin portion of the cam is adjacent to theportion l9 and the free ends of the rods 22 are swung grooves 27, as shown in ea er? outwardly until the cams 24 clear the portions 19 The side members 19 may then be turned" downwardlyon' their hinges. The end member 17f is folded downwardly, after which the blockwhich has been formed may be removed onv the pallet and a new pallet placed in position, for the manufactur'e'of another block. If. desired,catch devices .0 of the type used on window sashes may be employed for locking the walls 29 to" the pallet 15 to prevent upward movement of said walls 29 during the process of manufacture.

My improved mold has a number Ofrflflvantages, many. of which may readily. be

seen vfrom the: foregoing description, The parts are of. comparatively s1mple and inexpensive construction. They may be quickly, and easily assembled and when assembled are firmly heldin position so'thattheplastio material in the spacebetween the inneraand outer walls may be tamped thoroughly;

- It is "readily seen that the four? outerwalls are locked together and the four inner wallsare locked together so that the: concrete blocks, when made, will be of" uniform. size:

and shape. it has been seen that 611611131117. 7 ufacturedblock; will have on its'luwer edge a bead andin its upper edge a groove, which, it will be understood, corresponds in size, with said beadso that when the, blocks are placed in superposed position, the groove and bead will fit together. It will readily be seen that the chimney may be very readily built. from blocks of this kind. 'Aftera block has been completed in a mold, the

walls of the mold are readily and easily taken away for removing the block and pallet. The parts maybe quickly and easily repaired or replaced.

It will be noted that as shown in Fig. 3 the rods 33 in the assembled mold are connected with the inner wallsat points locatedapproximately midway between the vertical.

. 11o of, so that each end wall is firmly bracedat.

hinged line of said walls and the ends there the most appropriate point for holding it firmly against inward pressure from; the weight of the concrete due to the tamping of the concrete.

It will be understood that many changes edges of the sections and being adapted to fold inwardly along said line, arms pivoted arm to the adjacent section of the next to the inner surface of one section ofeaoh inner Wall at a point substantially'midway between the hinged line thereof and the end of said sectionyand means for locking said ing 50 arranged that each inner Wallis walls thereby.

Des Moines, Iowa, October 31, 1913.

JOHN M.

inner Wall at a point substantially'midway Vitnesses: thereon between the hinged line 01" said sec- S. ROBINSON, tlon and the free edgethereof, said arms be- M. WALLACE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

braced with relation to the two other inner v10 1 

